IMSA

Take a look beneath the bodywork of the new Acura ARX-05 DPi with unrivaled access provided for RACER by Honda Performance Development Prototype project leader Matt Niles. RACER.com's coverage of the Rolex 24 At Daytona is presented by Forgeline Motorsports, manufacturers of custom made-to-order lightweight forged aluminum street and racing performance wheels.

Mike Conway led Friday's final practice session for the Rolex 24 At Daytona, turning a lap of 1m36.865s in the No.31 Whelen Engineering Cadillac DPi-V.R in the day's lone on-track activity for the IMSA WeatherTech SportsCar Championship competitors. Competitors used the one-hour session to make final changes to their race setups. Many of the teams cycled through all of their drivers, using each p...

Tristan Vautier ran the fastest lap of Thursday's 90-minute night practice for the Rolex 24 At Daytona, running 1m37.215s in the No. 90 Spirit of Daytona Cadillac DPi-V.R. After being denied the pole by a scant .007s in afternoon qualifying, Helio Castroneves held the top spot for most of the session with a lap of 1m37.413 in the No. 7 Acura Team Penske Acura ARX-05. Once again, he wound up secon...

Helio Castroneves seemed fairly confident of capturing the pole for the 56th Rolex 24 At Daytona, taking the No. 7 Acura Team Penske Acura ARX-05 to pit roa with a few minutes remaining in the 15-minute session after running a lap of 1m36.090s. With the checkered flag waving and Castroneves set to exit the Acura for a round of post-qualifying photos and interviews, Renger van der Zande knocked th...

Fernando Alonso says he got "the maximum" out of his United Autosports Ligier during qualifying for the Rolex 24 at Daytona and is not frustrated by the LMP2 car's lack of pace. The double world champion has admitted he is primarily using his first 24-hour race as practice for a potential future attempt at Le Mans as he chases the Triple Crown. Alonso was tasked with qualifying the No.23 car on T...

Renger van der Zande saved his best for the final seconds of Thursday's qualifying, turning a track record lap of 1m36.083s at the checkered flag in the Wayne Taylor Racing Cadillac DPi-V.R to capture the pole for the 56th Rolex 24 At Daytona. He nipped Acura Team Penske's Helio Castroneves by a mere .007s. Starting lineup Van der Zande is the new driver for the No. 10 Konica Minolta Cadillac, 20...

IMSA's favorite teams and fastest drivers struggled to grasp the enormity of what had just taken place after 24 hours of frenzied racing. Porsche's streak of 11 consecutive wins at Daytona International Speedway, including back-to-back victories in 1986 and 1987 by Al Holbert Racing with its proven 962 prototype, had been broken. The culprit, Tom Walkinshaw Racing USA's upstart program, still in ...

Acura Team Penske went to the top of the speed chart in Thursday's second practice session for the Rolex 24 At Daytona, as Helio Castroneves posted the best lap of the day so far, 1m37.036s in the No. 7 Acura ARX-05. Results Nicolas Lapierre was second in the No. 22 Tequila Patron ESM Nissan Onroak DPi with a 1m37.360s, followed by Filipe Albuquerque, 1m37.385s in the No. 5 Mustang Sampling Cadil...

Alessandro Pier Guidi was a busy man at the recent Roar Before the Rolex 24 , being the lone driver to set up and test the No. 62 Risi Competizione Ferrari 488 GTE. His efforts will pay off this weekend, when he is joined by co-drivers Toni Vilander, James Calado and Davide Rigon for the 56th Rolex 24 At Daytona. "We tried some different setups at the Roar, because I was all by myself," Pier Guid...

America's most prolific BMW privateer team, Turner Motorsport, has racked up numerous race victories and championships, most recently the 2014 IMSA WeatherTech SportsCar Championship GT Daytona title with Dane Cameron. Missing from that resume, though, is a victory in the Rolex 24 At Daytona. Team owner Will Turner is looking to change that in this weekend's 56th running of the classic. "You can ...

RACER's Marshall Pruett and BAR1 Racing owner Brian Alder discuss the team's graduation to IMSA's top Prototype class in the WeatherTech SportsCar Championship and how the American effort is finding interest from customers who want to race the No. 20 Riley/Multimatic Mk. 30.

Following the team's second consecutive championship-winning season in the IMSA Continental Tire SportsCar Challenge, RS1 will start the first race of the season on the pole position after Spencer Pumpelly posted the fastest lap in the Grand Sport (GS) qualifying session on Thursday. Driving the No. 28 Porsche Cayman GT4 MR, Pumpelly's time of 1m55.136s (111.306mph) bested the previous track reco...